| 单晶LaB6阴极在微波电子枪中的应用 |
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| 引用本文： | 黄永章 射家麟. 单晶LaB6阴极在微波电子枪中的应用[J]. 强激光与粒子束, 1993, 5(2): 228-232 |
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| 作者姓名： | 黄永章 射家麟 |
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| 作者单位： | 中国科学院高能物理研究所，中国科学院高能物理研究所 北京2732信箱 100080，北京2732信箱 100080 |
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| 摘 要： | 随着自由电子激光器的发展,高亮度微波电子枪越来越受到重视,为满足北京自由电子激光器注入器的要求,高能所进行了国内首台热阴极微波电子枪的实验研究,采用单晶LaB_6做阴极材料。本文描述了在研制过程中所解决的阴极表面处理、夹持、加热等一系列工艺问题,首次采用电子束焊的方法将LaB_6与基金属牢固结合,最后给出实验结果:阴极发射密度可达84A/cm~2,阴极寿命200h,加热灯丝寿命大于500h。
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| 关 键 词： | 微波电子枪 阴极 电子枪 硼化镧 |
APPLICATION OF LaB_6 IN THE MICROWAVE ELECTRON GUN |
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| Huang Yongzhang and Xie Jialin Institute of high energy physics,Academia Sinica,P.O.Box ,Beijing. APPLICATION OF LaB_6 IN THE MICROWAVE ELECTRON GUN[J]. High Power Laser and Particle Beams, 1993, 5(2): 228-232 |
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| Authors: | Huang Yongzhang Xie Jialin Institute of high energy physics Academia Sinica P.O.Box Beijing |
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| Affiliation: | Huang Yongzhang and Xie Jialin Institute of high energy physics,Academia Sinica,P.O.Box 2732,Beijing 100080 |
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| Abstract: | With the development of free electron lasers (FELs), high brightness microwave electron gun is being paid more and more attention. An thermionic cathode microwave electron gun with monocrystal LaB6 was designed and tested in the Institute of High Energy Physics, in order to meet the requirement of Beijing Free Electron Laser (BFEL).This paper presents the methods of solving the problems encountered in the research such as surface treatment, holding and heating of LaB6. The electron beam melting was used to melt LaB6 with base metal tantalum at first. The emission current density is 84A/cm2, the life time of the cathode is 200 hours and the lifetime of the heater is longer than 500 hours. |
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| Keywords: | microwave electron gun lanthanum hexaboride cathode heater. |
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